Import patches-unapplied version 0.6.4.2-0ubuntu1.1 to ubuntu/wily-proposed

Imported using git-ubuntu import.

Changelog parent: fd2645e32d61bde17366920978a6b5f812e2c3ae

New changelog entries:
* Fix FTBFSs on ppc64el and arm64 (LP: #1513124):
- ppc64el: drop endian override in powerpc architecture definition
allowing both big and little endian builds.
- zfs-initramfs -- this is only build on the indep architecture so only
attempt to chmod the hook files if they are present.
- arm64: reorder sys/types.h sys/param.h includes to avoid include ordering
issues on arm64.